java远程下载文件到本地

方法一 

**
 * 下载远程文件并保存到本地
 * 
 * @param remoteFilePath-远程文件路径
 * @param localFilePath-本地文件路径（带文件名）
 */
public void downloadFile(String remoteFilePath, String localFilePath) {
	URL urlfile = null;
	HttpURLConnection httpUrl = null;
	BufferedInputStream bis = null;
	BufferedOutputStream bos = null;
	File f = new File(localFilePath);
	try {
		urlfile = new URL(remoteFilePath);
		httpUrl = (HttpURLConnection) urlfile.openConnection();
		httpUrl.connect();
		bis = new BufferedInputStream(httpUrl.getInputStream());
		bos = new BufferedOutputStream(new FileOutputStream(f));
		int len = 2048;
		byte[] b = new byte[len];
		while ((len = bis.read(b)) != -1) {
			bos.write(b, 0, len);
		}
		bos.flush();
		bis.close();
		httpUrl.disconnect();
	} catch (Exception e) {
		e.printStackTrace();
	} finally {
		try {
			bis.close();
			bos.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

方法二

/**
 * 下载远程文件并保存到本地
 * 
 * @param remoteFilePath-远程文件路径
 * @param localFilePath-本地文件路径（带文件名）
 */
public void downloadFile(String remoteFilePath, String localFilePath) {
	URL website = null;
	ReadableByteChannel rbc = null;
	FileOutputStream fos = null;
	try {
		website = new URL(remoteFilePath);
		rbc = Channels.newChannel(website.openStream());
		fos = new FileOutputStream(localFilePath);//本地要存储的文件地址 例如：test.txt
		fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
	} catch (Exception e) {
		e.printStackTrace();
	}finally{
		if(fos!=null){
			try {
				fos.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		if(rbc!=null){
			try {
				rbc.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

}